Transparent laser ceramics by stereolithography

Hostaša, Jan; Schwentenwein, Martin; Toci, Guido; Esposito, Laura; Brouczek, Dominik; Piancastelli, Andreana; Pirri, Angela; Patrizi, Barbara; Vannini, Matteo; Biasini, Valentina

doi:10.1016/j.scriptamat.2020.06.006

Cited by 35 publications

(18 citation statements)

References 12 publications

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“…Plot of the maximum relative transmittance against printing resolution of the 3D printed transparent spinel ceramics in this work, together with the data of other printed transparent ceramics (YAG) [ 11–31 ] and glasses for comparison. [ 16,21,29–32 ] …”

Section: Figurementioning

confidence: 99%

“…The optical quality of the spinel ceramics is closest to the theoretical transmittance limit, compared with the printed silica glass and YAG ceramics. [ 11–13,15,16,21,28–33 ] The printing resolution is much higher than that of many other printed transparent materials. Therefore, our work has simultaneously circumvented the two bottlenecks in optical transparency and printing resolution of the state‐of‐the‐art 3D printing techniques of transparent ceramics and glass, thus enabling the harnessing of the advantages of the unique physical properties of spinel ceramics and the flexibility of SLA 3D printing technique to create various advanced spinel based optics and catalyst supports for engineering applications.…”

Section: Figurementioning

confidence: 99%

“…[11][12][13][14] However, the highest transmittance of the ceramics is only ≈70%. Hostaša et al [15] have fabricated Yb:YAG ceramics plate using stereolithography (SLA) 3D printing method. The transparency of the ceramics achieved is also very low, at only ≈60%.…”

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confidence: 99%

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3D Printing of Transparent Spinel Ceramics with Transmittance Approaching the Theoretical Limit

Wang

Liu

et al. 2021

Advanced Materials

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3D printing of transparent ceramics has attracted great attention recently but faces the challenges of low transparency and low printing resolution. Herein, magnesium aluminate spinel transparent ceramics with transmittance reaching 97% of the theoretical limit are successfully fabricated using a stereolithography‐based 3D printing method assisted by hot isostatic pressing and the critical factors governing the transparency are revealed. Various transparent spinel lenses and microlattices are printed at a high resolution of ≈100–200 µm. The 3D printed spinel lens demonstrates fairly good optical imaging ability, and the printed spinel diamond microlattices as a transparent photocatalyst support for TiO2 significantly enhance its photocatalytic efficiency compared with its opaque counterparts. Compared with other 3D printed transparent materials such as silica glass or organic polymers, the printed spinel ceramics have the advantages of broad optical window, high hardness, excellent high‐temperature stability, and chemical resistance and therefore, have great potential to be used in various optical lenses/windows and photocatalyst supports for application in harsh environments.

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Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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3D Printing of Transparent Spinel Ceramics with Transmittance Approaching the Theoretical Limit

Wang

Liu

et al. 2021

Advanced Materials

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“…In recent years, the mold-less production of ceramics by additive manufacturing (AM) has attracted the increased interests in the eld of advanced ceramics, since AM allows for rapid fabrication of complex ceramic 3D structures with ne features [3][4][5][6][7]. So far, there have been different AM techniques under consideration, such as stereolithography [8][9][10], laser direct deposition [11,12], and direct ink writing (DIW) [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Direct Ink Writing of Cellulose - plasticized Aqueous Ceramic Slurry for YAG Transparent Ceramics

Zhao

Chen

et al. 2021

Preprint

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Additive manufacturing based on direct ink writing (DIW) opens a novel means to prepare transparent ceramics, which can comprise of both complex structures and multiple functional phases. However, there still remains a vital challenge to obtain a stable and printable aqueous ceramic slurry with high solids loading, which is important for forming high quality transparent ceramics. Therefore, we report a fabrication method by using celluloses for enhancing the plasticity of the aqueous YAG ceramic slurry with high solids loading up to 52 vol. %, by which both of the printability of ceramic slurries and the optical quality of transparent ceramics have been considerably improved. In the example, the in-line transmittance at 1064 nm for a 1.2 mm thick YAG ceramic can approach about 81.5%. This research provides a facile DIW method for preparing transparent ceramic from water - based slurry.

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“…Whilst metal parts are mainly printed directly by the different variants of Selective Laser Sintering (SLS), Selective Laser Melting (SLM), or quite recently by Electron Beam Melting (EBM) [ 13 , 14 , 15 , 16 ], ceramic parts can be printed via SLA and FFF using highly filled low viscous resins (SLA) or molten thermoplastics (FFF). In the case of SLA, this technology has been commercialized (Lithoz GmbH, Vienna, Austria, ), recent research can be found in [ 17 , 18 , 19 , 20 , 21 , 22 ]. The fabrication of ceramic or metallic parts by FFF has the major advantage that experience derived from powder injection molding (PIM) helps to develop highly filled feedstocks (ceramic: >45 vol.%, metal: >60 vol.% solid load) with a similar binder composition [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

New Feedstock System for Fused Filament Fabrication of Sintered Alumina Parts

Nötzel

Hanemann

2020

Materials

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Only a few 3D-printing techniques are able to process ceramic materials and exploit successfully the capabilities of additive manufacturing of sintered ceramic parts. In this work, a new two component binder system, consisting of polyethyleneglycol and polyvinylbutyral, as well stearic acid as surfactant, was filled with submicron sized alumina up to 55 vol.% and used in fused filament fabrication (FFF) for the first time. The whole process chain, as established in powder injection molding of ceramic parts, starting with material selection, compounding, measurement of shear rate and temperature dependent flow behavior, filament fabrication, as well as FFF printing. A combination of solvent pre-debinding with thermal debinding and sintering at a reduced maximum temperature due to the submicron sized alumina and the related enhanced sinter activity, enabled the realization of alumina parts with complex shape and sinter densities around 98 % Th. Finally the overall shrinkage of the printed parts were compared with similar ones obtained by micro ceramic injection molding.

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Transparent laser ceramics by stereolithography

Cited by 35 publications

References 12 publications

3D Printing of Transparent Spinel Ceramics with Transmittance Approaching the Theoretical Limit

3D Printing of Transparent Spinel Ceramics with Transmittance Approaching the Theoretical Limit

Direct Ink Writing of Cellulose - plasticized Aqueous Ceramic Slurry for YAG Transparent Ceramics

New Feedstock System for Fused Filament Fabrication of Sintered Alumina Parts

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